Author/Authors :
Jess، نويسنده , , Zdenek P. and Hubler، نويسنده , , U. and Behler، نويسنده , , S. and Thommen-Geiser، نويسنده , , V. and Lang، نويسنده , , H.P. and Güntherodt، نويسنده , , H.-J.، نويسنده ,
Abstract :
Rb3C60 single crystals (Tc = 30.5 K) are investigated in the superconducting state by scanning tunneling microscopy (STM) at 2.8 K. Electron tunneling spectroscopy (ETS) reveals a spatial variation of the superconducting energy gap Δ. This behaviour is attributed to varying stoichiometry on a scale of 50 nm. An investigation of a C60 facet shows that I(V) characteristics acquired between fullerene molecules exhibit additional gap states in contrast to those measured above molecules.
Keywords :
Fullerene , Spectroscopy , crystals , Rubidium
